Domestic appliance



1947- R. R. CANDOR DOMESTIC APPLIANCE Filed July 19, 1943 7 Sheets-Sheet 1 INVENTOR.

Feb. 18, 1947. CANDOR 2,416,084

DOMESTIC APPLIANCE Filed July 19, 1943 7 Sheets-Sheet 2 Feb. 18, 1947. R. R. CANDOR DOMESTIC APPLIANCE Filed July 19, 1943 '7 Sheets-Sheet 5 FvN 1 LT 5 \m K mm we 4v 4 m @m c N m6 @NEN Q na? NVENTOR.

Feb. 18, 1947.

R. R. CANDOR DOMESTIC APPLIANCE Filed July 19, 1943 7 Sheets-Sheet 4 INVENTOR. /t 0/s/ =re-r 4 510012 fi m Feb. 18, CANDQIR DOMESTIC APPLIANCE Filed July 19, 1943 7 Sheets-Sheet 5 Feb. 18, 1947. CANDQR ISOMESTIC APPLIANCE Filed July 19, 1945 7 Sheets-Sheet 6 FIxIS, 1947. CANDOR .DOMESTIC APPLIANCE Filed July 19, 1943 '7 Sheets-Sheet 7 Qmm com

INVENTOR. Gq YD 0,2

Patented Feb. 18, 1947 DOMESTIC APPLIANCE Robert R. Candor, Oakwood, Ohio, assignor to General Motors Corporation, Dayton,

Ohio, a

corporation of Delaware Application July 19, 1943, Serial No. 495,293.

(Cl. 2192Q) 19 Claims.

This invention relates to domestic appliances, and mor particularly to automatic clock and thermostatic control of the heating means of a range or the like.

Heretofore electric and gas ranges have been provided with clock controls and thermostatic controls. In order to cause the clock control and thermostatic control to cooperate in the desired manner, it has been customary to provide an and set knob or lever, the position of which determines whether the clock control shall or shall not dominate the thermostatic control. In addition, the clock control has been provided with an on tim indicator and an off time indicator, while the oven thermostatic control has been provided with one or more knobs to select the desired temperature and otherwise to control the oven. Consequently, it has been necessary for the user to set: (a) a clock on time indicator; (2;) a clock off time indicator; an off and set clock lever; and ((1) one or more knobs for the thermostatic control. As a consequence, in view of the numerous levers, knobs and indicators necessary to be set, the user has been apt to forget to set one of them, or to set one or more of them incor rectly, and thus fails to obtain the desired operation of the range.

For example, in the apparatus disclosed in the patent to Gallagher et al., 2,302,625, which is referred to merely by way of example, and which has been in extensive commercial use, the operator sets the on time indicator 29, the off time indicator 28, the off and set lever 33, the thermostat (Fig. 2 of said patent) and switch I55. This requires five knobs, levers or indicators to be set correctly in order to obtain proper combined clock and thermostatic control. The thermostat adjustment and switch I55 are quite frequent and familiar adjustments to the operator, and the on and off time indicators 29 and 28" are necessary to be set; but the ofi and set lever 33 is likely to be forgotten, and, ii forgotten, will prevent the desired operation of the oven or the range.

This invention obviates the necessity of the off and set lever, or corresponding control, and requires the operator only to set the on and off time indicators and the thermostatic control in order to obtain correct operation of the range oven. Means have been provided to take the clock out of control automatically after it has controlled a cooking cycle. In addition means have been provided to return the thermostatic control to the off position at the termination of a clock controlled cooking cycle, in order to prevent cook- 2 ing after the clock has passed the oil? time. However, means have been provided to prevent the clock from accidentally returning the thermostat control to the oil position during a non-clock controlled cooking operation.

The invention has been disclosed as applied to a thermostatic control provided with a single knob but many of the advantages of this invention may be obtained with the use of a multiple knob thermostatic control, such as one having a selector switch knob and a thermostatic knob. In this latter case the thermostat may be provided with an off position and temperature settings and may be controlled as herein disclosed, while the selector switch may be independently manually operated. It is also applicable to gas ranges as well as to electric ranges, as is readily apparent.

An object of this invention is to provide a clock control and a thermostatic control for the heating means of a range in such a manner that the setting of the on and off indicators of the clock,

and the setting of the thermostat at a temperature position automatically places the heating means under the combined control of said clock and thermostat until the clock time reaches the oil indicator time, at which time said clock is automatically taken out of control of the range until the indicators are reset.

Another object of this invention is to provide a combined clock thermostatic control such that it is only necessary to set the on and off indicators on said clock and the thermostatic control in order to place said clock automatically in combined control with said thermostat of the heating means on a range.

Another object of this invention is to provide a combined clock and thermostatic control such that it is only necessary to position on and off indicators on said clock and to adjust the thermostat to a selected temperature in order to place the combined clock and thermostat in control of the heating means of a range, during the period of time from the positioning of said indicators until the clock reaches the off indicator time, at which time the clock is automatically taken out of control until reset.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form oi the present invention is clearly shown.

In the drawings:

Fig. 1 is a diagrammatic representation of one embodiment of my invention;

Fig. 2 is a plan view of the clock switch meansshown in Fig. 1, at the time of the setting of the controls assuming such time to be 1:15 and the thermostat to be set at 300;

Fig. 3 is a view similar to Fig. 2, assuming the clock time to coincide with the on time (2 oclock);

Fig. 4 is a view similar to Figs. 2 and 3, assuming the clock time to have reached the first instant of the off time (4 oclock) 1 Fig. 5 is a view similar to Fig. 4, at a slight interval of time thereafter, when the thermostat manipulator has been automatically returned to the off position;

Fig. 6 is a view in perspective of a portion of the clock switch means surrounding the thermostat shaft;

Fig. 7 is a side view of the clock switch actuator means at the instant that the clock time reaches the on time (2 oclock);

Fig. 8 is a side view of the clock switch actuator means at the instant that the clock time reaches the ofi time (4 oclock) Fig. 9 is a view at right angles to Fig. 8;

Fig. 10 is a vertical cross-sectional view (somewhat diagrammatic) of the control mechanism shown in Fig. 1;

Fig. 11 is a view of the right hand end of Fig. 10, but showing a clutch mechanism, powered from the clock motor, for returning the thermostat manipulator to the 01f position;

Fig. 12 is a horizontal cross-section of a portion of Fig. 11, taken along the line 12-12, assuming the time to be the time of setting the controls prior to the on time (1:15 oclock);

Fig. 13 is a view similar to Fig. 12, when the clock time has reached the off time just before the thermostat manipulator is returned to the off position;

Fig. 14 is a horizontal cross-section taken along the line i l-M of Fig. 11 at a time corresponding with Fig. 12;

Fig. 15 is a vertical View of the gear train from the clock to the clutch mechanism;

Fig. 16 is a horizontal view of Fig. 15;

Fig. 17 is a diagrammatic view, somewhat similar to Fig. 1, showing spring powered means for returningthe thermostat manipulator to the off position;

Fig. 18 is a View of a portion of Fig. 17 showing a mechanical manual release for the spring means in lieu of a manual electrical release;

Fig. 19 is a vertical elevation, partly in crosssecticn, of a portion of the clock switch means shown in Figs. 17 and 18;

Fig. 20 is a top view of Fig. 19;

Fig. 21 is a view similar to Fig. 19, with certain portions removed;

Fig. 22 is a view of a portion of Fig. 19, with the clock switch means in a different position; and

Fig. 23 shows an addition to Figs. 17 through 22.

The improvements brought about by this invention have been shown in Figs. 1 through 16 as applied, for convenience, to a portion of the clock structure disclosed in the patent to W. P. Gallagher 2,301,942, granted November 17, 1942, entitled Timing mechanism. The numerals applied to the various elements in Figs. 1 through 16, which are below 200, are to be understood to be the same in structure and function, so far as possible, with the correspondingly numbered elements in said Gallagher Patent 2,301,942. Certain other improvements brought about by this invention, have been shown in Figs. 17

through 22 which utilize the clock and master switch construction of Figs. 1 through 16; but in which the thermostat is returned to the ofi position by spring power. In these latter modifications the thermostat has been indicated to be adjusted by turning in the opposite direction from that of Figs. 1 through 16. The action of plate H t of Figs. 17 through 22 ismore like that disclosed in the patent to W. P. Gallagher et al. 2,302,625, granted Nov. 17, 1942, for Electrical timing apparatus. The numerals applied to the various elements in Figs. 17 through 22, are to be understood to be the same in structure and function, so far as possible, with the correspondingly numbered elements in the previous description of Figs. 1 through 16. Detailed description of the elements disclosed in the said patents is not here repeated, and only such description of such elements is here given as may be necessary for the explanation of the improvements applied thereto reference being made to said patents for a fuller disclosure of them. The new elements or the old elements which have been radically modified, have been numbered with numerals over 200, in order to make it unnecessary to digress in the explanation each time that a new or old element is referred to or described. It is to be understood that all elements numbered below 200 are to have the structure and function, so far as may not be necessary to modify them, as in said patents, and that such elements are to cooperate with other necessary elements disclosed in said patents, which may or may not be disclosed in this application.

While I have shown the improvements of this invention to be applied to the structure of Patents 2,301,242 and 2,302,625, merely by way of example, it is to be understood that these improvements are applicable in any of the well known clock and thermostat constructions.

In Figs. 1 through 16, some of the parts of the clock mechanism in Gallagher Patent 2,301,942 have been slightly modified. The cooking ring 28 has been provided with electrical conducting track-ways 210' and 2i 1, which are electrically insulated from the ring 23. A pair of stationary electrical wiping contacts 212 and 213 are in electrical contact with the track-ways 210 and 21 l. A push button switch 214 is carried by the ring 23 and has its terminals connected with the tracks 2H] and 21 i and is opened by the pressing in of the push button 215. The switch 214 is to be positioned circumferentially with respect to indicator 28 so that it is actuated when the indicators 29' and 28" are in substantial coincidence. In Figs. 1 and 17 switch 214 has been shown directly under indicator 28", although in actual construction it may be slightly to the left. The ring 2'0 carries the oiT time indicator 28' or 28" substantially as in said patent. The on time indicator 20 or 29' or 29 is substantially the same as in said patent, and is carried by arm 96, which is provided with a finger 215 adapted to come in contact with the push button 215 when the indicators 29 and 28' are brought in substantial coincidence. The finger 2 96 has been shown extending, in exaggerated form, a substantial distance to the left of indicator 29', for convenience of disclosure. The circumferential relationship of finger 210 and button 2 i 5 is to be made such that the indicators 29' and 28" are in the desired coincidence when the switch 2M is actuated. The on cam 99 has its lower end shaped as in Fig. 7, with a gradual sloping portion 99, which moves the roller ml down to the locking abutment 99.

This construction causes the shifter sleeve N13 to move downwardly substantially the same as in the Gallagher Patent 2,301,942; but adds the function that the roller HH and stud I02 drive the arm 96 and on indicator 29', through the medium of abutment 99", into substantial coincidence with the off indicator 28". The off cam 98 is shaped as indicated in Fig. 8 and its lower end is sloped to a blunt apex 98' which extends below the level of the end of abutment 99". The roller l which is also mounted on stud I02 rides along the bottom of the oil cam 98 and further depresses the shifter sleeve I03 a sufficient distance to allow the roller l0l to ride under the abutment $9" and thus permit the stud I02 to ride around without further driving the on indicator 2!! or without moving the off indicator 28"; but leaves the indicators in substantial coincidence at the selected off time. When the cams 98 and 99 are in substantial coincidence, the finger 2I8 comes in contact with the push button 215 and opens the switch 2H for the purpose hereinafter to be more fully described. A pawl 2H has been added for the purpose of allowing the clock to be set in a clockwise direction; but preventing it from being set in an anti-clockwise direction, in order to prevent erroneous setting of the mechanism hereinafter to be described. The plate H9 has been modified in shape for a purpose hereinafter to be more fully apparent. In the modifications shown in Figs. 17 to 22, the clock construction, indicator, track-way, push button, finger and master switch construction are to be substantially the same as in the previous features. However, in the modifications of Figs. 17 through 22 the plate construction of 1 l9 follows more closely the operation of the plate H9 of Gallagher et al. Patent 2,302,625 rather than the plate construction of 2,301,922 in that the plate H9 is normally at its clockwise terminus in the off position in Figs. 17 through 22, whereas it is at its counterclockwise terminus in Figs. 1 through 16. The difference in operation of the plate I IS in the various figures will become more readily apparent in the more detailed description to follow. The off and set levers or knobs 33 of said patents have been omitted, as they are unnecessary with this invention.

Referring now to the present invention, 220 indicates a space to be heated. This space may be the oven of an electric range or any other similar space. Heating means 225 and/or 222 may be provided for the space. A clock, having a dial 22 may be provided for controlling the heating means, and is driven by the motor El through gearing H, 12, etc., as described in said patent. This clock may include an on time indicator 29, and an oil indicator 28", which may be moved by the operator to any selected on and off time indication. A thermostat 223 may be provided, which may be made responsive to temperature in the space or oven 223, for example,

through the medium of a thermostatic iiuid con-' taining bulb 224 within the space and connected by a fluid medium conducting tube 225 to the main switch construction of the thermostat, which is contained in the box 220. The thermostat switch means in box 225, together with the tube 225 and bulb 224 may be of any construction, such as is now well known in the electric range oven art, and therefore is not shown in detail. This structure, as well-known, includes thermostatic switching means and a bellows or diaphragm in box 226 (not shown) responsive to power derived from the how of fluid to and from the bulb 224. This turns the heaters 22l and 222 on and off in response to the temperature in the oven, so asto maintain a substantially constant selected temperature within the oven. The switching means and the bellows or diaphragm is capable of adjustment by the turning of shaft 22?, in such a manner that, when the thermostat control manipulating means or knob 228 is in the off position, no electrical power can reach the heaters 22! and 222, regardless of the temperature in the oven. However, when the manipulator or knob 228 is turned to any selected temperature setting, such as through 500, then the switch construction in box 22 5 turns the heaters 22| and 222 on and 012 in response to fluid impulses from the bulb 224i to maintain the oven at substantially the temperature selected by the position of the manipulator 228. Preferably the construction is such that, when the manipulator 228 is turned to the broil position, then only the upper heater 222 is energized; but at any other temperature setting, such as between 150 through 500 the lower heater 225 is energized at full Wattage and the upper heater 222 is energized at reduced Wattage for baking. To obtain the reduced wattage, one terminal of heater 222 is connected, through a resistance 229, with the neutral line N of the power source. Also, if desired, the thermostat construction may be such that when the knob 228 is first turned to broil and then to a lower temperature setting both heaters 221 and 222 are energized at full wattage until the selected temperature is reached, after which the heaters are turned on and off with the upper heater 222 at reduced wattage and the lower heater 22! at full wattage. This preheat cycle is not ordinarily used when the clock control is being utilized. Such a thermostat construction has been used commerically on ranges manufactured and sold in this country, and is, per so, well known. A dicclosure of the principles or operation is to be found in the application of Francis H. McCormick S. N. 232,592, iiled Sept. 30, 1938, or the application of Victor Webber, S. N. 323,162, filed March 9, 1940.

A source of power may be provided, such as two or more power lines 230 and 23%. The power lines 230 and 23l are connected to a master switch 232. When the indicators 22 and 28 are positioned to different on and off times, the master switch 232 connects the power lines 230 and 23I to the clock switch means 233 through the lines 234 and 235 and from thence to the thermostat 223, through the lines 238 through 239. When the indicators 29' and 23" are brought together, the power lines 230 and 23! are connected directly to the thermostat by the master switch 232 and lines 233 and 239 as hereinafter more fully explained.

The clock 22 automatically releases the clock switch plate H9 when the clock hand 22 coincides with the on and off positions (in a manner disclosed in said Gallagher Patent 2,301,942) to close the clock switch means 233 at the on time and to maintain it open previous to the on time. Contacts 220 and 2 of the switch means 233 are connectible to the power source 230 and 23! through the medium of master switch 232 and lines 234 and 235. The other contacts 222 and 243 of the switch means 233 are connected to the thermostat 223 through the medium of lines 236 through 239.

Means are provided for automatically placing a the clock in control of the thermostat 223 when the indicators 29' and 28 are positioned to different on and off times, and for automatically connecting the thermostat 223 directly to the power lines 239 and 23f when the indicators 29 and 28" are brought into substantial coincidence. To this end, the master switch 232 is biased in the down position by the spring 2M and is pulled to the upper position by the solenoid 2 55. The solenoid 2:35 is energized whenever the indicators 25 and 28" are spread apart, and is deenergized whenever the indicators are brought together as hereinafter more fully explained. Thu whenever the indicators 2e and 28 are spread apart, the power is routed from power lines 233 and 23| through the master switch 232, lines EM and 235, contacts Zllii through 2 53 and lines 2-35 through 239 to the thermostat 223. The thermostat 223, in turn, controls the flow of power to the heaters 22i and 222 in accordance with the setting of the manipulator 223. When the indicators 29' and 2B are brought together, the master switch 232 moves to its lower position, so that power from the source and 23! flows directly through the master switch 232 and lines 238 and 239 to the thermostat 223 without passing through the clock switch means 233. This enables the operator to use the thermostat 223, without the clock control, merely by leaving the indicators 25 and 2% together; or the operator may use the clock control in combination with the thermostat by placing indicators 29 and 28" at different on and off times and by adjusting the thermostat knob 22% to a selected temperature.

Control of master switch 232 by the position of indicators 28 and 28 preferably is accomplished by an electric circuit which includes the stationary Wiping contacts 252 and 2E3, which ride upon the movable tracks 2) and 2, respectively, carried by the movable ring 28, on which the oil indicator 28" is secured, The ring 23 also carries the push button switch 2M, which is spring-pressed in closed position, but is opened by the pushing in of button 2l5. The on indicator 25' is carried by an arm 96 and is provided with a finger 256 which pushes against the button 2'55 when the indicators 29 and 28" are brought into substantial coincidence. (By coincidence is meant positions as close to each other as is desired or construction will allow.) One of the stationary wiping contacts 2E3 is con-- nected by the line 2% to the solenoid 2 35, which in turn is connected to one of the power lines 238. The other wiping contact H2 is connected to the other power line 23! by line 247. Therefore, whenever the switch ti l is in closed position, the solenoid 2:35 is energized, and when the switch 21 i is in open position, the solenoid 2'35 is deenergfzed. The solenoid 2% operates the switch 232 through plunger 245a. Since the switch 2M is closed whenever the indicators 29 and 28" are spread apart, and the switch H4 is open when they are together or in substantial coincidence, the solenoid 2 333 is energized when the indicators are spread apart to raise the switch 232 to its upper position, and the solenoid 2&5 is deenergized when the indicators 29' and 28" are together or in substantial coincidence to allow the switch 232 to spring to its lower position. Accordingly, the power flows from 238 and 23| through switches 232 and 233 and thermostat 223 to the heaters 22! and 222 when the indicators 29 and 28" are spread apart, and the manipulator 22.8 is positioned at some temperature setting- On the other hand, power flows directly from power lines 233 and 21H through the switch 7232, lines 238 ;and 239 and thermostat 223 to the heaters 22! and .222 (without passing through switch 233) when the indicators 29' and 28" are together. The operator, therefore, may control the heating oi oven 220 by combined clock and thermostat control by setting the on and off time indicators 29' and 28" and the thermostat knob 228; or the operator'may control the heating of the oven 220 by the thermostat alone by setting the thermostat knob 228 and leaving the indicators 29 and .28 in coincidence.

The solenoid 2 55 and master switch 232 may constitute a unitary relay which may be located at any convenient place .on the range, It may be located inside the .casing 2!, or it may be mounted within the range at any desired location.

The plate H9 and the switch cam I21 of Gallagher 2,301,942 have been modified when used in this invention according to Figs. 1 through 10 in the following manner. The switch plate H9 is provided with an upwardly extending lug 250 with which the lug 25! cooperates. The lug 2,5! is secured to the shaft 221 and is used to rewind the plate 1 is when the thermostat knob 228 is turned from some temperature setting to the off position. The plate l 59 also has the switch cam i2! attached to it by the sleeve 252, The cam i2i is provided with camlobes 253 and 254 which are so located that, when the stop shoulder IE2 is held by the lever [$97, the lobes 253 and 254i hold the movable contacts 242 and 243 away from the stationary -contacts 260 and 2M. When the stop 1-23 is against the lever Hi1, then the lobes 253 and 254 move away from the movable contacts 242 and 2A3 and allow them to come into contact with the stationary contacts Z iil and 24!. The plate I I9 is also provided with a lobe 255 which moves the oil arm 256 and the on arm '25? 0.1 a snap switch 258 for a purpose hereinafter to be more fully explained. The plate H9 is also provided with another lobe 259 which cooperates with the solenoid plunger 260, so that the plunger 266 may hold the plate I IS in its wound counterclockwise position at certain times when the lever id? is retracted, as more fully hereinafter to be described. The solenoid plunger 2% is spring-pressed to the left by spring Zeta, and is retracted by the solenoid 26! whenever the solenoid is energized.

The shaft 22? carries a contact disc 252 which is made of insulating material and carries the conducting are 253 in such a position that the are 253 bridges the lines 264 and 265 when the knob 228 is at a temperature setting, such as from through 500. The purpose of solenoid plunger 2%, as will be hereinafter more apparent, is to hold the plate H9 in its wound position, when the solenoid 25! is deenergized, in order to prevent the plate H9 from unwinding and causing the thermostat knob 228 to be returned to-the ofi position at an undesired time. The master switch 232 and the are 263 determine the conditions under which the solenoid plunger 26?] may be or may not be retracted.

Means are, provided for automatically returning or positioning the thermostat control manipulating means or knob 228 to the off position when the clock on and on indicators 29' and 28" are brought together by the clock. To this end, a motor 266 is provided which is automatically energized by the snap switch 258, through lines 2553a, when the clock and the on indicator reach the off time (4 oclock). The motor 266 is then geared to the shaft 227 to drive the shaft 221 counterclockwise back to the off position of knob 228. Any suitable arrangement for gearing the motor 266 to the shaft 221 may be used. Merely by way of example, a beveled gear, or friction disc, 25'! may be keyed to the shaft 221, and a beveled gear, or friction disc, 258 may be secured to the armature shaft 289 of the motor 266. The armature of the motor 265 may be slightly longitudinally biased to the right, as diagrammatically indicated at 210, so that when the motor 265 is deenergized the shaft 259 automatically biases to the right; but when the motor 265 is energized then the armature 219 is magnetically pulled to t 1-9 left, causing the beveled gear 288 to come in contact with the gear 26! and to drive the shaft 221 counterclockwise. As will be hereinafter more fully described, the motor 266 returns the shaft 22'! and knob 228 from any temperature setting back to the off position whenever the indicators 29 and 28" are brought together to cause the plate I I9 to unwind. The shaft 221 is provided with 3. lug All which comes in contact with the abutment 212 when the knob 228 reaches the off position and prevents the movement of shaft 22? counterclockwise beyond the off position. The motor 265 may be permanently geared to shaft 221, if it is de sired to omit the automatic clutch action of discs 251 and 258. The motor then will be turned at all times that the knob 228 is turned.

The operation of the modification shown in Figs. 1 to is as follows:

Assume that the clocktime is 1:15, and that the operator wishes the oven to start to bake at two oclock and to stop baking at four oclock, at a temperature of 300. Fig. 1 indicates these conditions, except that the knob 228 has not yet been turned to 300. When the user places the on indicator 29 at two oclock and the off indicator 28 at four oclock, and moves the thermostat knob 288 to 300, the position of plate I i9, arm I51 and associated parts assume the positions indicated in Fig. 2. The solenoid 258 is retracted because the master switch 232 was raised to its upper position by the separation of the indicators 29 and 28". This energized the line 234, which carried electrical power to the solenoid 250, and from thence through the line are 253 and line 265 to the neutral or ground line, thus completing an electrical circuit through solenoid 25!. At this time (Fig. 2) the lobes 253 and 254 maintain the contacts of switch 233 in open position, thus preventing electrical power from reaching the heaters 22I and 222, the electrical circuit thereto being broken at switch 233.

At the on time, which is assumed to be two oclock, the plate H9 assumes the position shown in Fig. 3. This is accomplished because the roller IIJI has come in contact with cam 93 and has reached the position indicated in Fig. '7, so that the cam 39 has depressed the stud I02 and shifter sleeve I03, thus rocking the arm N11 to the position indicated in Fig. 3 through the medium of arm or lobe I83, shown in Fig. 10 and diagram l matically indicated by the dotted line H18 in Fig. l. The movement of lever ii to the position shown in Fig. 3 allows the plate H8 tounwind clockwise, under the tension. of spring i125, so that the arm I23 comes in contact with lever 151'. This closes switch and allows electrical energy to flow from the power source 225, 23!. through switches 232 233 to the thermostat 223. Since the oven is assumed to be cold at this time, the thermostat switch construction in box- 225 will be closed by the action of bulb 224 and will allow electrical energy to flow to the heaters 22I and 222. These heaters quickly raise the temperature of the oven to 300, at which time the fluid flow from the bulb 224, acting on the bellows and switch construction in box 228, open that switch construction in box 226 and deenergizes the heaters until the temperature in the oven 22% falls a slight amount below 300. At this time, the switch construction in 226 due to the return of fluid to bulb 224 (as is well understood) again energizes the heaters 22I and 222. This turning on and off of the heaters continues from shortly after two oclock until four oclock.

At the first instant of the off time, which is assumed to be four oclock, the plate II9 assumes the position shown in Fig. 4, by reason of the fact that the lever I01 is retracted through the action of cam 98 and roller 20I, which acts on the shifter sleeve I53 and arm or lobe I58 to rock the lever I91 to the position shown in Fig. i. In addition, when the indicator 29' comes into substantial coincidence with the indicator 28" at four oclock, the finger 2I6 contacts the push button 2 I 5 and allows the switch 232 to assume its lower position. This deenergizes the solenoid 25! and allows the plunger 280 to be spring-pressed to the left. The lobe 2'55 strikes the on arm 251 of the snap switch 258 and closes the switch 258 to energize the motor 266. The motor then turns the shaft 22'! counterclockwise so that the shaft 221, acting through lugs 25I and 250, winds the plate against the action of spring I26 to the position shown in Fig. 5. The plunger 260 has snapped over the lobe 259 and locked the plate H9 in the position shown in Fig. 5. The lobe 255 has struck the off arm 256 of the snap switch 258 and has deenergized the motor 266 just as the knob 228 reaches the off position.

When the various controls reach the position indicated in Fig. 5, the power source 230, 23I is connected directly to the thermostat 223 through the lower position of master switch 232. The circuit then has been placed in a condition such that the heaters 22I and 222 cannot be energized because the switch construction in box 226 is opened whenever the knob 223 is in the off position. This therefore breaks the electrical circuit from 230 and 2-3I at 226. The arrangement is then in such a condition that, if desired, the user can turn the oven on to any heating condition desired independently of the clock merely by turning the knob 228 and leaving the on and off indicators in coincidence (both at four oclock or any other coincidental position); or, if desired, the user can again place the oven under the combined control of the clock and the thermostat by setting the on and off indicators 29 and 28" at separated times and by adjusting the knob 228 to some temperature position.

When the user wishes to operate the oven 229 without clock control he turns the knob 228 from the off position to some other desired position without separating the indicators 29' and 28". Even if the clock time should cross the position of the indicators 29' and 28" (when they are in coincidence), this will not affect the setting of the knob 228 because the motor 266 cannot return the knob 228 to the off position. The reason for this is that the solenoid 26I cannot be energized when the switch 232 is in its lower position .(as it is when the indicators 29' and 28" are in coincidence). The solenoid plunger 260 therefore holds the plate H9 in the position shown in Fig. 5; under these conditions, even though the cam 93 does cause the shifter sleeve I03" to rock the lever Hl'l away from the plate H9 to the position shown in Fig. 5. The motor snap switch 258 therefore remains open andthe motor 266 does not return the knob 228 to the off position. Therefore the user may operate the oven. under the control of knob 228, independently of the clo k. so long as the user does not spread the indicators 29' and 28" apart.

If desired, a lamp 216 may be provided to be energized only when the operator has" properly placed the on and off indicators 29' and 28"v in spread apart condition and has turne'dthe knob 228 away from the off position to some position between 150 through 500". In otherLwords, the lamp 216 is energized. only when the user has properly set the controls so that the clock will'cooperate with the thermostat to energize the oven under baking conditions for a selected period of time.v The lamp 21s can only be energized when the switch 232 is in its proper position (when the indicatorsxZS and 28" are spread apart) and when the disc 262 has been turned so that the are 263 bridgesthe'lin'es 254' and 255 (when the knob 228 is between 150 through 500). Therefore; when the user wishes to set the" controls to turn on the oven at some future time under proper clock and. thermostat control, he will be assured that all necessary knobs have been adjusted when the lamp 216' is energized.

The-modification shown in Figs. 11 through 16 is substantially the same as that heretofore disclosed with regard to Figs. 1 through 10, except that, in Figs. 11 through 16, the thermostat knob 223;- an'd. shaft 221, are returned to the off position by-theclock motor 6| instead 'of'by the additional motor 266. It is to be understood that the undrawn portion of the apparatus shown in Figs. 11 through 16 is to be the same as that disclosed in Figs. 1 through 10.

The knob 228, and shaft 227-, in Figs. 11 through 16 is'geared tothe motor 6.! (of Figs. 1 and through the means of gear train 280, which is connected at one end'to the clock motor gear Tl, gear 28!. Any suitable ratio of gear drive may be'used, which will drivethe shaft 22'! reasonably fast and in acounterclockwise direction. The gear 28% is keyed to the driving clutch member 28-3, which isrotatable independently of shaft 221; The driven clutch member 283 is axially s-lidable on, but rotationally keyed to, the shaft 221, and is provided with an annular groove 284. A bell crank 2&5 is fulcrurned at 286 and has a rounded knob 28 in the annular groove 284'. A spring 238' pulls on the bell crank 225 normally to bias'the driven clutch member 283 in its upper position. The upper arm of the bellcrank 285 is actuated by a cam 289, which has a protuberance 29b. The cam 229 is keyed to the shaft 291', to the upper end of which is secured a fixture 292 having anoff arm 2'9'3and an on arm 294, which have the sameult'imate function as the off and on arms 256 and ll'in Figs. 1 to 10. That is, when th'elobe2'55-of the plate H9 strikes the off arm 293 as indicated in Fig. 12, the fixture 292 snaps, by the action of snap-spring 295, to the ofi position and disengages the clock 6! from the shaft 221 and stops rotation of knob 228. This is accomplished because the fixture 292, when in its position in Fig. 12 carries the cam 289'to the position shown in 14. This rocks the bell crank EM counterclockwise and lowers the driven clutch member'222 away from the driving clutch member 222 to disengage the clutch. On the and at theother end to the clutch driving other hand, when the lobe 255 of plate l H! strikes the on arm 294, as shown in Fig. 13, the fixture 292' and cam 2&9 rock counterclockwise to move the protuberance 29!] away from the bell crank 285, thus allowing the spring 288 to rock the bell crank 225 clockwise and bring the driven clutch member 223 into contact with the driving memher 282. Rocking of cam 288 is limited by slot 289a and'pin'289b.

From the foregoing description it is apparent that theuser 0f the modification shown in Figs. 11' through 16 may set the clock indicators 22' and 28 (as in Fig. 1) and may set the knob 22%; at some selected temperature, such as 300, with all of the members acting exactly as previously described with respect to 3. through 10. When so set, some of the parts assume the positions shown in Fig. 12, which corresponds to Fig. 2, and at this time the clock motor 5! cannot drive the shaft 222i, and the oven is not heated because the switch 233 is open; At two oclock (the on time) the plate H9 and lobe 5255 move slightly; but do not actuate the arm 292' at all, or sufiiciently to snap the fixture to the on position. The switch 233 is closed by this movement of plate H9, however, as previously described withregard to Figs. 1 to 10, to allow the thermostat 223 to heat and control the oven until four oclo'ck'. At four oclock the plate H9 moves and assumes the position shown in Fig. 13, at which time the lobe 255has struck and moved the on arm 29 i sufiiciently to snap the fixture 292 to the on position. This engages the clutch members 282 and 22s and causes the clock motor El to drive the shaft 22? and knob 228 to the off position through the medium of gear train 280, and clutch members 232 and 283. As the shaft 221' is moved counterclockwise the lug engages the lug 259 and winds the plate I l 9 counterclockwise until the lobe 255 strikes the off arm 293 and disconnects the clutch 283, 284 at the time when the knob 222 reaches the oif position. All of the other parts whether shown or not shown in Figs. 11 through 16 operate the same as previously described with regard to Figs. 1 through 10.

In the modifications shown in Figs. 17 through 22, the knob 228, and shaft 227 are returned to the off position by the spring 3% instead of by motor power. In these modifications, the knob 228 is turned counterclockwise from the off position to the temperature positions and is returned clockwise, which the opposite to the action described with regard to Figs. 1 through 16. The thermostat 223 is the same as previously described, except that it is to be adjusted by rotation in the opposite direction. The clock 22, and all of the other parts to the left and below the dotted line 3m, operate exactly as previously described with regard to'Figs. 1 through 16, and their description is therefore not repeated, although corresponding parts are correspondingly numbered. The shaft 227! is biased clockwise by the spring 330 which is attached at one end to the shaft 221 and, at the other end, to any stationary support, such as box 225. It is also provided with a stop lug 2H which strikes against the abutment 212 when knob 228 reaches the off position. A spring 3532 is secured at its lower end to the shaft 22? and at its upper end to the plate H8 and imparts a clockwise bias to the plate H9. lhe plate H2 is mounted on a sleeve 393 which is both axially and rotatably slidable on shaft 22?. The sleeve 3% is provided with a stud 384- and two roller 385a and 3&51) having 13 substantially the same type of action as stud 102 and rollers IOI and 29! in Figs. '1 to 9. Ihe knob 228 and shaft 221 have a cam 333 fixed thereto, which has substantially the same type of action with respect to roller 305a as cam 33 shown in Fig. 7. A stationary cam 32! supported independently of shaft 221, is mounted to be engaged by the roller 323b, substantially the same as cam 33 in Fig. 8. This construction is such that, as the knob 22?! is turned counterclockwise from the off position, the cam 306 engages the roller 335a, as indicated in Fig. 22, and carries it to the position shown in Fig. 19, by the time that the knob 223 reaches the 150 position. In Figs. 17, 18 and !9, the plate I59 and rollers 335a and 3351) are shown after they have been wound counterclockwise by the partial turning of the knob 233 to the 150 position. However, the knob 228 and cam has then been returned to the off position (by a means hereinafter to be described) thus leaving the plate H9 held by the lever ill'i. When the user decides to turn the knob 223 again to any temperature position, the cam 303 can ride over the rollers and 3351), as is apparent from Fig. 19, and allows the knob 238 to be turned to any desired position without turning the plate I I9 beyond t1 e position shown in Figs. 17 and 18. It is to be understood that the user may turn the knob 228 from the off position to any temperature position without returning the lunch to the off position. The drawings Figs. 17, 13 and 19 have merely been drawn with the knob returned to the off position for convenience in disclosure. Normally the plate H9 is in the dotted line position when the nob g 223 is at the off position.

The shaft 221 is provided with a ratchet 338 which is engaged by a pawl 339, normally counterclockwise biased by the spring indicated by the arrow 3H3. The pawl 309 may be turned clockwise to release the ratchet 388 and shaft 221 by the solenoid plunger 3II under the action of solenoid 3I2 which is controlled by the push button switch 3l3, a circuit being formed from power lines 230 and 23I through lines 3I4, 3I5, solenoid 3I2 and line 3I6 whenever the push button is depressed. Whenever the push button 3I3 is depressed the pawl 309 is taken out of engagement with the ratchet 308 and the knob 228 is driven to the off position by the action of spring 300. Thus the user can change the position of knob 228 clockwise whenever desired merely by depressing switch 313, as has been illustrated in Figs. 17, 18 and 19.

The master switch 232, in Fig. 17 operates as previously described. When in its upper position, the switch 232 energizes the lines 3l1 and 3i3 which lead to the clock switch 233 having movable contacts 3i9 and 320. The stationary contacts 32I and 322 are connected by lines 323 and 324 to the lines 238 and 239 leading to the thermostat 223. Therefore, whenever the switch 232 is in its upper position and the clock switch 233 is closed, the power lines 230 and 23I are connected to the thermostat 223 through the clock switch 233. In the off position of the knob 228, and up to any position near 150, the switch in box 226 is open (as is well known) and prevents either of the heaters 22I or 222 from being energized regardless of the position of switches 232 or 233. When the pointers 29 and 28 are spread apart to raise the switch 232, and when the knob 228 is moved to some temperature position, such as 300, the plate H3 assumes the position shown in Fig. 17, so that the lobe 325 opens the clock switch 233. When the clock time coincides to the On indicator (at two oclock), the lever I01 is moved to allow the arm I22 to pass, but arrest the arm I23. This moves the lobe 325 away from the contacts 3I9 and 328 and allows them to close the contacts 32I and 322. Electrical power then can fiow from 233, 231, through the upper position of switch 232 and the clock switch 233 to the thermostat 223 and from thence to the heaters 22I and 222. The thermostat then controls the operation of the heaters to maintain substantially 300 in the oven until four oclock, when the indicators 23 and 28" are automatically carried into coincidence. This first moves the lever I81 to release the arm I23 and thereafter opens switch 2M to allow the switch 232 to assume its lower position. The relative position of cams 99 and switch 2 I 4 is shifted a slight degree in the modifications of Figs. 17 through 22, so that the switch 2M opens after the lever I81 has released arm I23. Therefore the first action (movement of lever I01) occurring at four oclock releases the arm I23 so that lobe 328 strikes push button 321 of push button switch 328. Switch 328 is normally open and is closed only when push button 328 is pushed inwardly. When lobe 32B impacts on button 321 the switch 328 energizes the solenoid 352 through lines 329 and 3I6. This releases the pawl 339 and ratchet 388 and allows the spring 339 to return the knob 228 to the off position. Thereafter the switch 2M is opened by finger 2H5 and allows the master switch 232 to assume its lower position, to connect the thermostat 223 directly to the lines 230 and 23!.

The operation of the modification shown in Fig. 17 is as follows: Assume that the user, at 1:15 oclock, wishes to have a baking operation, regulated at 300, start at two oclock and stop at four oclock. Under these conditions the user places the off indicator 28" at four oclock and the on indicator 29 at two oclock. He also adjusts the knob 228 from the off position to 300. This causes the master switch 232 to assume its upper position, and causes the plate H9 to rotate counterclockwise from the dotted line position to the full line position. In turning the knob 228 from the off position, the abutment 303a engages the roller 383a and rotates the plate I is counterclockwise. As the turning progresses, the other roller 33% engages the lower sloping edge 301a of cam 301, thus lowering sleeve 333 and plate I l9 until the apex 3831) rides over its roller 335a. At this time the plate I 59 is locked by the lever I01 while the shaft 221 may be further rotated to a selected temperature. (When the shaft 221 is returned, the sloping edge 3060 allows the cam 303 to ride over the roller 3050..) It also adjusts the thermostat 223 to maintain a 300 temperature in the oven 223. At two oclock the lever I01 is moved slightly to allow the arm I22 to pass, but remains in the way of arm I23, so that the plate H3 is rotated slightly in a clockwise direction. This moves the lobe 325 away from the switch 233 to close the same and allows current to flow from the power lines 233, 23I, through switches 232 and 233 to the thermostat 223 and from thence to the heaters 22! and 222. The thermostat 223 cycles the heaters 22I and 222, in response to temperature in the oven 220 to maintain the same at 300 from two oclock until four oclock. four oclock the pointers and 28" have been brought automatically into substantial coincidence. The lever I31 is then first moved to release the arm I23 and allow the plate H9 to rotate and bring the lobe 326 into contact with thepush button 321. This produces an electric circuit through solenoid '3 I 2, pulling pawl tod and releasingratchettlit to allow the springxfitilito .drivethe'knob 228 back to the off position. A few moments thereafter the finger 2&6 engages push button 2E5. This deenergizes the solenoid 245 andallows the switch 232 to assume its lower position, thus connecting the thermostat 223 directly with the power lines 236 and .235 (without passing through switch 233). Thereafter the user is free to adjust the thermo stat knob 228 independently of the clock control if desired.

Should the user change his mind after having set the knob 228, he'merely pushesdown on push button to create an-electric circuit through :thesclenoidS i 2. This causesthe pawl SE59 to-disengagefrom the ratchet and .allowthe knob to return to the off position.

.ln 18,,the action of all of the parts is exactly the same as in Fig. 17, except that the pawl is mechanically actuated by a cam Slit car- .i'ied-on a shaft 335 having a lever 332 at its upper The user can release the ratchet 3538 merefy by m glever .332 counterclockwise against the At four oclock, the lobe 32-5 impinges on the lever 3%, carried by the shaft 83E instead of st push button switch of Fig. 17. The lever rocks the shafted! to release the ratchet in the samemanner that the switch accomplishes it electrically in Fig. 17.

operation of the modification shown in Fig. 18 is the same as the operation heretofore described fer the modification of Fig. 17, except that, instead of pushing down on button 3H3 of 3.7, the user-rotates the lever 332against the stop whenever the user wishes to return the knob 228 to the oil position. Also, when it is four oclcck, the plate iii) rotates to bring the lobe 32% into contact with the lever 334, to rotate tn shaft and cam $535 to release the ratchet 398 and allow the spring 3538 to drive the knob 228 to the position.

Fig. shows the additional the solenoid lock construction 256, Edda ail-[126i and lobe 259 added tothe plate lid of Figs. 17 through 22. Under con uction to the plate N9 of Figs. 17 through the purpose of preventing the plate from accidentally tripped by the clock at an rable time. The plate lid of Figs. 17 to 22 may have a lobe 25$ added, together solenoid construction 2%, race and 26!. 1st 22? may be provided with a contact previously described with regard to to 16 inclusive. An electric circuit may 'ovided for the solenoid. 26E leading iroman per stationary contact 'of switch 232 through d, solenoid line. 264, are SE53 and line I 2855 c th neutral or ground line, thus completing an electrical circuit throughsolenoid ESE. The remainder of the electric circuit is the same as that shown in Figs. 17 or 18. The solenoid plunger isspring-pressed in the same manner the plunger described with regard to Figs. 1 to 15 inclusive. The solenoid 25! can only be to retract the plunger. see when the k on indicators 25' andfi i" are spread t (to raise switch 232) and when knob 2278 is t some temperature position (to cause arc to bridge lines Zfi land 265). The plunger ii thus maintains the plate 5 is in wound, counterclockwise position even if the clock time should cross the cnand, ofi indicators when theyv are not spread apart. The action of solenoid .Z itla 253i, and lobe 259is thus the same in Figs. 17

;-t0 23 inclusive as itisin Figs. 1 tolfi'inclusive.

conditions it is desirable to add this solenoid 16 While the form of embodiment .of the invention in disclosed, constitutes a preferred form, to understood that other forms might be ted, as may come within the scope of the is which follow. .Jhat is claimed is as follows:

i. A heating arrangement comprising a space to be heated, heating means for said space, a clock, an on in-...cator on said clock, an ofi" indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, control manipulating means for said thermostat having on and temperature settings, means automatically responsive when said control manipulating means is positioned at a temperature setting and said indicators are positioned at a different on time from an off time to place said clock in control of said thermostat to start a heating cycle at said on time and termi note said heating cycle at said off time, and means automaticaly positioning said control manipulating means at said on setting when said clock reaches said ofi" time.

2. A heating arrangement comprising a space to be heated, heating means for said space, a clock, an on indicator on said clock, an oil? indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, control manipulating means for said thermostat having off and temperature settings, means automatically responsive when said control manipulating means is positioned at a temperature setting and said indicators are positioned at a different on time from an elf time to place said clock in control of said thermostat to start a heating cycle at said On time and terminate said heating cycle at said oil time, and means automatically taking said clock out of control of said thermostat and automatically positioning said control manipulating means at'said off setting-when said clock reaches said off time.

3. A heating arrangement comprising a space to be heated, heating means for said space, a clock, an on indicator on said clock, an off indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, an adjusting manipulator for said thermostat having off and temperature settings, and means automatically responsive to the positioning of said manipulator at a temperature setting and the positioning of said on indicator at a different on time from the positioning of said oh indicator at an off time'forplacing said clock in control of said thermostat to start a heating period at said on time and terminatesaid heating period at said off time and to carrysaid on indicator to substantial time coincidence with said off indicator.

4. A heating arrangement comprisinga space to be heated, heating means for said space, a clock, an on indicator on said clock, an ofi indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, an adjusting manipulator for said thermostat having oiT and temperature settings, andmeans automatically responsive to the positioning of said-manipulator at a temperature setting and the positioning of said on indicator at a different on time from the positioning of said off indicator at an oil time for placing said clock in control ofsaid thermostat to start a heating I periodatsaid ontime and terminate said heating period .at said off time and to position said-imaznipulator at said 01f setting. 7

.5. ,-A heating arrangement comprising aspace' 17 to be heated, heating means for said space, a clock, an on indicator on said clock, an of! indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, an adjusting manipulator for said thermostat having off and temperature settings, and means automatically responsive to the positioning of said manipulator at a temperature setting and the positioning of said on indicator at a different on time from the positioning of said ofi indicator at an off time for placing said clock in control of said thermostat to start a heating period at said on time and terminate said heating period at sa d all time and to carry said on indicator to substantial time coincidence with said of! indicator and to position said manipulator at said oflf setting.

6. A heating arrangement comprising a space to be heated, heat ng means for said space. a

clock, an on indicator on said clock, an off indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, means automatically responsive when said indicators are posit oned at a difierent of! time from an on time to place said clock in control or said thermostat to start a heating period at said on time and to carry said on indicator to substantial time co ncidence with said off indicator and to take said clock out 01' control of said thermostat at said of! time.

'1. A heating arrangement comprising a space to be heated, heating means for said space, a clock an on indicator on said clock an off indicator on said clock, a thermostat responsive to temperature in said space and controlling said heating means, an adjusting thermostat manipulator having an off position and temperature positions, means for placing said clock in control of said thermostat when said on and off indicators are positioned at a difierent on time from an off time to start a heating period at the on time selected by said on indicator and to terminate sa d heating period at the t me selected by said of! indicator. means automatically to place said thermostat in control of said heating means when said thermostat manipulator is positioned at a temperature position, means to carry said on indicator to substantial t me coincidence with said off indicator and to take said clock out of control of said thermostat at said ofi time. and means automatically moving said thermostat mani ulator to said of! position substantially at said oh! time.

8. A heating arrangement compr sing, a space to be heated. heating means for said s ace, a clock, an on ind cator on said clock, an off indicator on said clock. a thermostat res onsive to tem erature in said space and controlling said heating means, means automatically responsive to the setting of sa d on and off indicators to place said clock in control of said thermostat to start a heating period at the time selected by the setting of said on indicator and to terminatesaid heating period at the time selected by the setting of said oil indicator, and means automatically taking said clock out of control of said thermostat at said last named time until one 01 said indicators has been reset.

9. A heating arrangement comprising an electrical power source, a space to be heated, electric heating means for said space,'an electric clock connected to said source, an on indicator on said clock, an ofi indicator on said clock, a thermostat responsive to temperature insaid space,

thermostat control manipulating means for said thermostat having off and temperature settings, means automatically placing said thermostat in control of said heating means when said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said off setting, clock-switch means connected to said thermostat to be open when said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and after the on indicator, and master switch means automatically connecting said power source to said clock switch means when said indicators are positioned to different times and connecting said power source directly to said thermostat when said indicators are positioned substantially to the same time.

10. A heating arrangement comprising an electrical power source, a space to be heated, electric heating means for said space, an electric clock connected to said source, an on indicator on said clock, an off indicator on said clock, a thermostat responsive to temperature in said space, thermostat control manipulating means for said thermostat having off and temperature settings, means automatically placing said thermostat in control of said heating means when said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said off setting, clock-switch means connected to said thermostat to be open when said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and after the on indicator, master switch means automatically connecting said power source to said clock switch means when said indicators are positioned to different times and connecting said power source directly to said thermostat when said indicators are positioned substantially to the same time, and means on said. clock to carry said on indicator to substantial time coincidence with said off indicator as said clock time progresses from the on time to the off time.

11. A heating arrangement comprising an electrical power source, a space to be heated, electric heating means for said space, an electric clock connected to said source, an on indicator on said clock, an ofi indicator on said clock, a thermostat responsive to temperature in said space, thermostat control manipulating means for said thermostat having off and temperature settings, means automatically placing said thermostat in control of said heating means when said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said off setting, clock switch means connected to said thermostat to be open when said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and after the on indicator, master switch means automatically connecting said power source to said clock switch'means when said indicators are positioned to different times and connecting said power source directly to said thermostat when said indicators are positioned substantially" to the same time, means on said clock to carry said on indicator to substantial'time coincidence with said off indicator as said clock time progresses from the on time to the off time, and means automatically driving said thermostat control manipulating means if previously setat a temperature 'setting to said 19 off setting substantially when said clock time progresses to the ofi time.

12. A heating arrangement comprising an electrical power source, a. space to be heated, electric heating means for said space, an electric clock connected to said source, an on indicator on said clock, an off indicator on said clock, a thermostat responsive to temperature in said space, thermostat control manipulatingmeans for said thermostat having ofi and temperature settings, means automatically placing said thermostat in control of said heating means when said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said off setting, clock switch means connected to said thermostat to be open when said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and after the on indicator, master switch means automatically connecting said power source to said clock switch means when said indicators are positioned to different times and connecting said power source directlyto said thermostat when said indicators are positioned substantially to the same time, means on said clock to carry said on indicator to substantial time coincidence with said oh. indicator as said clock time progresses from the on time to the ofi time, and electric motor means automatically driving said thermostat control manipulating means if previously set at a temperature setting to said of)? setting substantially when said clock time progresses to th off time.

13. A heating arrangement comprising an electrical power source, a space to be heated, electric heating means for said space, an electric clock connected to said source, an on indicator on said clock, an ofi indicator on said clock, a thermostat responsive to temperature in said space, thermostat control manipulating means for said thermostat having oiT and temperature settings, means automatically placing said thermostat in control of said heating means when. said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said on setting, clock switch means connected to said thermostat to be open When said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and after the on indicator, master switch means automatically connecting said power source to said clock switch means when said indicators are positioned to diiferent times and connecting said power source directly to said thermostat when said indicators are positioned substantially to the same time, means on said clock to carry said on indicator to substantial time coincidence with said on indicator as said clock time progresses from the On time to the off time, and clutch means powered from said electric clock automaticallydriving said thermostat control manipulating means if previously set at a temperature setting to said off setting substantially when said clock time progresses to the ofi time.

14. A heating arrangement comprising an electrical power source, a space to be heated, electric heating means for said space, an electric clock connected to said source, an on indicator on said clock, an off indicator on said clock, a thermostat responsive to temperature insaid space, thermostat control manipulating means for said thermostat having oh? and temperature settings,

means automaticallyplacing said thermostat in control of said heating means when said control manipulating means is at a said temperature set ting and taking said thermostat out of control of said heating means when said control manipulating means is at said ofi setting, clock switch means connected to said thermostat to be open when said clock indicates a time prior to the on indicator and to be closed when said clock indicates a time at and. after the on indicator, master switch means automatically connecting said power source to said clock switch means when said indicators are positioned to different times and connecting said power source directly to said thermostat when said indicators are positioned substantially to the same time, means on said clock to carry said on indicator to substantial time coincidence with said off indicator as said clock time progresses from the on time to the on" time, and spring means automatically driving said thermostat control manipulating means if previously set at a temperature setting to said oif setting substantially when said clock time progresses to the oiT time.

15. A heating arrangement comprising-an electrical power source, a space to be heated, electric heating means for said space, an electric clock connected to said source, anon indicator on said clock, an ofi indicator on said clock, a thermostat responsive to temperature insaid space, thermostat control manipulating means for said thermostat having off and temperature settings, means automatically placing said thermostat in control of said heating means when said control manipulating means is at a said temperature setting and taking said thermostat out of control of said heating means when said control manipulating means is at said on setting, clock switch means connected to said thermostat to be open when said clock indicates a time prior to theon indicator and to be closed when said clock indicates a time at and after the on indicator, master switch means automatically connecting said power source to said clock switch means when said indicators arepositioned to different times and connecting said power source directly to said thermostat when said indicators are positioned substantially to the same time, means on said clock to carry said on indicator to substantial time coincidence with said 01f indicator as said clock timeprogressesirom the on time to the off time, spring means automatically driving. said thermostat control manipulating means if previously setat a temperature setting to said off setting substantially whenhsaid clock time progresses to the off time, and manual release means for causing said. spring means to drive said thermostat controlm-anipulating means from a temperature setting to said off setting.

16 A heating arrangement comprising a space to be. heated, heating means for said space, a clock, an on indicator on. said clock, anoff indicator on said clock, a thermostat responsive to temperature in. said, space and, controlling, said heating means, control. manipulating means for said thermostat having, oil and temperature. settings, means automatically responsive when said control manipulating means is. positioned at. a temperature setting and said. indicators. are positioned at a different on time from an. ofi time to place said clock in control of said thermostat to start. a heating cycle at said on. time and terminate said heating cycle at said ofi time, and a lamp. to differentiate other conditions. from the condition when said. control manipulating means has been set at a temperature setting and said on and 011 indicators have been positioned at different times.

17. In combination: a source of electrical power; a device to be energized from said source; a. control switch for said device between said source and device having on and off positions; a timer having a time indicator, a timer switch, an on timer switch actuator and an oil timer switch actuator; means causing said on timer switch actuator to follow said time indicator while said actuator and indicator are in coincidence until said on timer switch actuator is in substantial coincidence with said oil timer switch actuator; means placing said control switch and timer switch in joint control of said device when said actuators are separated and taking said timer switch out of control of said device when said actuators are in substantial coincidence; and means automatically changing said control switch from on position to oil position when said actuators are brought into coincidence.

18. In combination: a source of electrical power; a device to be energized from said source; a control switch for said device between said source and device having on and off positions; a timer having a time indicator, a timer switch, an on timer switch actuator and an off timer switch actuator; means causing said on timer switch actuator to follow said time indicator while said actuator and indicator are in coincidence until said on timer switch actuator is in substantial coincidence with said off timer switch actuator; means placing said control switch and timer switch in joint control of said device when said actuators are separated and taking said timer switch out of control of said device when said actuators are in substantial coincidence; means automatically changing said control switch from on position to 011 position when said actuators are brought into coincidence; and means permitting the subsequent setting of said control switch in on position while said actuators are in substantial coincidence.

19. In combination: a device to be electrically energized; a clock; an on indicator On said clock; an off indicator on said clock; a switch controlling the energization of said device; control manipulating means for said switch having off and on settings; means automatically responsive when said control manipulating means is positioned at an on setting and said indicators are positioned at a different on time from an off time to place said clock in control of said switch to start an energizing cycle at said on time and terminate said cycle at said oil time; means automatically positioning said control manipulating means at said off setting when said clock reaches said 011 time; and means automatically permitting the subsequent setting of said control manipulating means at an on setting to energize said device independently of said clock until said on and off indicators are reset.

ROBERT R. CANDOR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,990,342 Mongelli et al Feb. 5, 1935 1,416,009 Forshee May 16, 1922 1,758,619 Phillips May 13, 1930 2,276,930 Clark Mar. 1'7, 1942 1,495,020 Hall May 20, 1924 2,166,683 Grayson July 18, 1939 2,224,593 Brown et a1 Dec. 10, 1940 2,300,950 Lux Nov. 3, 1942 2,301,942 Gallagher Nov. 17, 1942 2,302,625 Gallagher et a1 Nov. 17, 1942 2,310,527 Huff Feb. 9, 1943 2,392,166 Lockwood Jan. 1, 1946 

